KR200493639Y1 - Ultra-precise centripetal grinding system using complex oscillating motion of spindle - Google Patents

Abstract

The present invention relates to an ultra-precise centripetal grinding system using the complex oscillation motion of the spindle, which is uniformly made with the grinding tool as the lens is oscillated by the z-axis spindle mounted on the x, y-axis yoke and y-axis yoke. The tool driving part 100, lens driving part 200, x-axis yoke part 210, and y-axis yoke part that maintains uniform processing quality according to mass production by improving the centripetal polishing precision and preventing uneven wear of the polishing tool due to friction. (220), the z-axis spindle 230, including the eccentric drive unit 240 is a main configuration.

Description

{Ultra-precise centripetal grinding system using complex oscillating motion of spindle}

The present invention relates to an ultra-precise centripetal grinding system using the complex oscillation motion of the spindle. More specifically, the lens is oscillated by the x-axis and y-axis yoke portions and the z-axis spindle mounted on the y-axis yoke portion. The present invention relates to an ultra-precise centripetal grinding system using a complex oscillating motion of a spindle that uniformly rubs the surface to improve centripetal grinding precision and prevents uneven wear of grinding tools and maintains uniform processing quality for mass production.

In general, the manufacture of lenses used in optical devices such as cameras, compact disk drivers, facsimiles and sights, endoscopes, telescopes, etc. is performed by rough cut processing of a material of a certain size and smoothing the surface. It is completed through the grinding process.

At this time, a lens grinder including a centripetal grinder is used to grind the surface of the lens, and this centripetal grinder is largely composed of two parts. That is, the lens polishing machine is composed of a cylinder block to which a lens to be polished is fixed and rotated to perform a polishing process, a motor that rotates the rotation holder, and a polishing member for polishing the lens is attached. The grinder is usually operated by hand.

The main condition required in the optical industry related to such a centripetal polishing machine requires the ability to improve the surface finish of the lens without changing the curvature of the lens surface. Technology development is steadily being made to remove traces that appear during processing and to perfectly maintain the prescribed curvature.

Accordingly, in Patent Registration No. 10-0453989 disclosed in the prior art, a microhead is installed at one end of the upper bracket fixed to the bracket, one end of a tension spring is installed at the other end of the upper bracket, and the other end of the tension spring Silver is installed at one end of the plate, the other end of the plate is fixed to the center housing and rotates around a pin, and at the end of the microhead, a bracket with an indicator for setting the polishing thickness of the lens is installed. / Moves downward, a spring fixing plate is fixed to the bottom of the bracket, a tension spring is installed at one end of the spring fixing plate, and the sensing rod of the indicator comes into contact with a setting bolt installed on the plate, and the setting bolt is In contact with the pressure pin shaft, a spindle shaft for rotational motion and a pressure pin shaft for vertical and rotational motion are sequentially inserted into the center housing, and a pressure pin on which an upper tool is installed is at the lower end of the pressure pin shaft. It is fixed, a rubber cover is fixed to the lower end of the spindle shaft, and a technology in which the lower end of the rubber cover is fixed to the pressure pin shaft has been previously proposed.

However, the prior art is a technique for precisely polishing the surface of a small optical lens, but the lens curvature that can be polished and the lens curvature that can be polished as the lens is configured to be limitedly tilted in a section set by the tilting driver while rotating by the spindle driving unit The polishing range was limited, and in response to the change in the standard of the lens to be polished, the initial setting required a lot of time and effort.

KR 10-0453989 B1 (2004.10.13.)

Accordingly, the present invention was conceived to solve the above problems. As the lens is oscillated by the z-axis spindle mounted on the x- and y-axis yoke portions and the y-axis yoke portions, the polishing tool and the entire surface are uniformly rubbed. Its purpose is to provide an ultra-precise centripetal grinding system using a complex oscillating motion of a spindle that improves centripetal grinding precision and prevents uneven wear of grinding tools and maintains uniform processing quality according to mass production.

In order to achieve this purpose, a feature of the present invention is provided with a polishing tool 130 installed in the main body 10, which is moved up and down by the tool transfer unit 110, and the polishing pressure is adjusted by the pressure control unit 120. A tool driving part 100; And a lens driving part 200 provided to rotate the lens L in a position opposite to the polishing tool 130 of the tool driving part 100 and to move the lens L eccentrically in the 360° direction;

The lens driving part 200 is pivotally moved around an x-axis shaft 212 installed in the main body 10, and an x-axis yoke part 210 provided with a pair of first support arms 214, and A pair of second support arms 222 are provided on the first support arm 214 to be connected to the y-axis shaft 224, and a y-axis yoke portion in which a z-axis hole 226 is formed in the lower center ( 220) and a lens tool 232 inserted into the z-axis hole 226 to which a lens L is mounted, and is rotated by a driving source to rotate the lens L. It characterized in that it comprises a spindle 230, and an eccentric driving unit 240 provided to eccentrically move the lens (L) in the direction of 360 ° together with the z-axis spindle 230.

In this case, the eccentric drive unit 240 includes a servo motor that independently drives the x and y axis shafts 212, and each servo motor is provided to be operated in conjunction with each other by a control unit.

In addition, the eccentric drive unit 240, a vertical shaft 242 installed on the multi-body 241 and rotated by a driving source, a horizontal guide rail 243 connected to the vertical shaft 242 and rotated, and a horizontal type A transfer table 244 mounted on the guide rail 243 and positioned by an adjustment tool 244a, a driving side eccentric shaft 245 installed on the transfer table 244, and the z-axis spindle 230 A link arm 247 connecting the driven side eccentric shaft 246 installed under the y-axis yoke part 220 so as to be coaxial with the driving side eccentric shaft 245 and the driven side eccentric shaft 246 It characterized in that it comprises a.

In addition, the link arm 247 is oscillated to the support point of the holder module 248 so that the driving side eccentric shaft 245 and the driven side eccentric shaft 246 rotate eccentrically in opposite directions, and the holder module 248 , A multi-shaft 248a installed on the multi-body 241 and rotated freely, and a support rail 248b provided to accommodate a link arm 247 on the upper part of the multi-shaft 248a, and the link arm 247 ) Is characterized in that it is provided so as to move linearly and rotate the multi-shaft 248a to the support point by riding the support rail (248b).

In addition, the eccentric drive unit 240 is provided so that the eccentric movement center point of the lens L is variable by the eccentric axis variable module 250, and the eccentric axis variable module 250 is installed under the multi-body 241 And a transfer vehicle 252 on which a driving wheel 251 is installed, a transfer rail 254 installed on the main body 10 to guide the movement of the transfer vehicle 252, and one end of the transfer vehicle 252 It is screwed, and the other end is installed on the main body 10 and includes an adjustment screw 256 rotatably provided by the handle 256a, and the z-axis spindle ( 230) is characterized in that it is provided so that the eccentric rotational power is transmitted in an inclined state, so that the center point of the eccentric movement of the lens L is variable.

In addition, the moving rail 254 is formed with an arcuate curvature protruding convexly downward, and the arcuate curvature center C1 is provided so as to coincide with an intersection point C2 in which axes of the x and y axis shafts 212 are in contact with each other, The eccentric drive unit 240 is provided so that the inclination of the z-axis spindle 230 corresponding to the rotation angle of the adjustment screw 256 in the entire curve moving on the moving rail 254 having an arcuate curvature is maintained constant throughout the entire area. It is characterized.

In addition, it is installed in the y-axis yoke part 220, the upper part is opened, the z-axis spindle 230 and the lens L are accommodated therein, and a hopper 260 having an outlet 262 formed at the lower part is provided. And, the hopper 260 is characterized in that it is provided to collect and discharge the cutting oil and grinding chips supplied to the lens (L) side.

In addition, the tool transfer unit 110, a vertical guide rail 112 installed in the longitudinal direction on the top of the main body 10 and the vertical guide rail 112 is moved in the vertical direction, and at one end a pressure control unit ( It characterized in that it comprises a rod arm 114 in which the mounting hole 114a is formed so that 120 is installed, and a drive cylinder 116 for controlling the vertical movement of the rod arm 114.

In addition, the pressure control unit 120 is inserted and fixed in the mounting hole (114a) of the load arm 114, the outer sleeve 121 having a first through hole (121a) formed therein, and the outer sleeve ( The inner sleeve 122 is inserted into the first through hole 121a of 121 and fixed in position by the fastener 122a, the fixing bracket 122b is installed on the top, and the second through hole 122c is formed therein. ), and a pressure shaft 123 inserted into the second through hole 122c of the inner sleeve 122 and on which a lifting bracket 123a is installed, and a polishing tool while being installed to rotate at the bottom of the pressure shaft 123 The pressure pin 124 to which the 130 is detachably mounted, the elastic body 125 which is installed to pressurize the pressure shaft 123 from the top, and the compression force is adjusted by the adjusting screw 125a, and the fixing bracket 122b ) Is installed in the microhead 126 provided so that the measuring surface 126a faces upward, and the sensing rod 127a is installed on the elevating bracket 123a, and the sensing rod 127a is provided with the measuring surface 126a of the microhead 126 The microhead 126 includes an indicator 127 disposed to be in contact, and the polishing tool 130 is in contact with the upper surface of the lens L or the upper surface of the lens tool 232 by moving the rod arm 114 downward. It is characterized in that it is provided to set the indicator 127 to a zero point by using and detect the polishing dimension by detecting the measured value of the indicator 127 based on the zero point during the subsequent polishing of the lens (L).

According to the above configuration and operation, the present invention improves centripetal polishing precision and polishes the entire surface with the polishing tool as the lens is oscillated by the z-axis spindle mounted on the x, y-axis yoke and y-axis yoke. It has the effect of uniformly maintaining the processing quality according to mass production by preventing uneven tool wear.

1 is a block diagram showing an overall ultra-precision centripetal grinding system using a complex oscillating motion of a spindle according to an embodiment of the present invention.
Figure 2 is a block diagram showing the pressure control unit of the ultra-precision centripetal grinding system using a complex oscillating motion of the spindle according to an embodiment of the present invention.
3 is a block diagram showing a state in which the x-axis oscillation part of the ultra-precision centripetal grinding system using the complex oscillation motion of the spindle according to an embodiment of the present invention rotates.
4 is a block diagram showing a state in which the y-axis oscillation part of the ultra-precise centripetal grinding system using the complex oscillation motion of the spindle according to an embodiment of the present invention rotates.
Figure 5 is a block diagram showing the eccentric drive of the ultra-precision centripetal grinding system using a complex oscillating motion of the spindle according to an embodiment of the present invention.
6 to 7 are configuration diagrams showing the operating state of the eccentric drive unit of the ultra-precision centripetal grinding system using the complex oscillating motion of the spindle according to an embodiment of the present invention.
8 to 9 are configuration diagrams showing the eccentric shaft variable module of the ultra-precise centripetal grinding system using the complex oscillating motion of the spindle according to an embodiment of the present invention.
10 is a block diagram showing the operation state of the eccentric shaft variable module of the ultra-precise centripetal grinding system using the complex oscillating motion of the spindle according to an embodiment of the present invention.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. Further, in describing the present invention, when it is determined that the subject matter of the present invention may be unnecessarily obscured as a matter that is obvious to the technicians of this field for related known functions, the detailed description thereof will be omitted.

The present invention relates to an ultra-precise centripetal grinding system using the complex oscillation motion of the spindle, which is uniformly made with the grinding tool as the lens is oscillated by the z-axis spindle mounted on the x, y-axis yoke and y-axis yoke. The tool driving part 100, lens driving part 200, x-axis yoke part 210, and y-axis yoke part that maintains uniform processing quality according to mass production by improving the centripetal polishing precision and preventing uneven wear of the polishing tool due to friction. (220), the z-axis spindle 230, including the eccentric drive unit 240 is a main configuration.

The tool driving part 100 according to the present invention is provided with a polishing tool 130 that is installed in the main body 10 and is moved up and down by the tool transfer unit 110 and the polishing pressure is adjusted by the pressure control unit 120. .

The tool transfer unit 110 is moved vertically on a vertical guide rail 112 installed on the upper body 10 in a longitudinal direction, and a vertical guide rail 112, and a pressure control unit 120 at one end thereof It includes a rod arm 114 in which a mounting hole 114a is formed to be installed, and a driving cylinder 116 for controlling the vertical movement of the rod arm 114.

In FIG. 2, the pressure control part 120 is inserted and fixed into the mounting hole 114a of the load arm 114, and an outer sleeve 121 having a first through hole 121a formed therein, and an outer sleeve 121 An inner sleeve that is inserted into the first through hole 121a of the sleeve 121 and fixed in position by a fastener 122a, a fixing bracket 122b is installed at the top, and a second through hole 122c is formed therein. (122) And, the pressure shaft 123 inserted into the second through hole (122c) of the inner sleeve (122), the lifting bracket (123a) is installed on the upper side, while being installed to rotate at the bottom of the pressure shaft (123) A pressure pin 124 to which the polishing tool 130 is detachably mounted, an elastic body 125 installed to pressurize the pressure shaft 123 from the top, and the compression force is adjusted by the adjusting screw 125a, and a fixing bracket A microhead 126 installed on 122b and provided so that the measurement surface 126a faces upward, and installed on the lifting bracket 123a, and the sensing rod 127a is the measurement surface 126a of the microhead 126 ) And an indicator 127 disposed to be in contact with it.

Accordingly, the rod arm 114 is moved downward to zero the indicator 127 using the microhead 126 while the polishing tool 130 is in contact with the upper surface of the lens L or the upper surface of the lens tool 232 to be described later. After setting, it is provided to detect the polishing dimension by detecting the measured value of the indicator 127 based on the zero point while polishing the lens L afterwards.

In addition, the lens driving unit 200 according to the present invention is provided to rotate the lens L at a position opposite to the polishing tool 130 of the tool driving part 100 and to perform an eccentric movement in the 360° direction.

The lens driving part 200 is pivotally moved around an x-axis shaft 212 installed in the main body 10, and an x-axis yoke part 210 provided with a pair of first support arms 214, and A pair of second support arms 222 are provided on the first support arm 214 to be connected to the y-axis shaft 224, and a y-axis yoke portion in which a z-axis hole 226 is formed in the lower center ( 220) and a lens tool 232 inserted into the z-axis hole 226 to which a lens L is mounted, and is rotated by a driving source to rotate the lens L. It includes a spindle 230, and an eccentric driving unit 240 provided to eccentrically move the lens (L) in the direction of 360 ° together with the z-axis spindle 230.

As such, the z-axis spindle 230 is rotated by a drive source including a motor mounted on the y-axis yoke part 210 of the eccentric driving part 240, and is rotated by the x- and y-axis yoke parts 210 and 220. The eccentric movement is performed in the 360° direction, and a specific embodiment of the eccentric driving unit 240 according to this will be described later.

The eccentric drive unit 240 according to an embodiment includes a servo motor (not shown) that independently drives the x and y axis shafts 212, as shown in FIG. 1, and each servo The motors are provided to be operated in connection with each other by the control unit. At this time, as the x- and y-axis shaft 212 is repeatedly rotated in the forward and reverse directions by the servo motor as shown in FIGS. 3 to 4, the z-axis spindle 230 moves eccentrically with the lens L in the 360° direction. It is equipped to do.

Eccentric driving unit 240 according to another embodiment, as shown in FIG. 5, the eccentric driving unit 240 is installed on the multi-body 241 and connected to the longitudinal axis 242 and the longitudinal axis 242 rotated by a driving source. A horizontal guide rail 243 that is rotated and rotated, a transfer table 244 mounted on the horizontal guide rail 243 and positioned by an adjustment tool 244a, and a driving side eccentric installed on the transfer table 244 The shaft 245 and the driven side eccentric shaft 246 installed under the y-axis yoke part 220 so as to be coaxially aligned with the z-axis spindle 230, the driving side eccentric shaft 245 and the driven side It includes a link arm 247 connecting the eccentric shaft 246.

In addition, the link arm 247 is swung to the supporting point of the holder module 248 so that the driving side eccentric shaft 245 and the driven side eccentric shaft 246 are rotated eccentrically in opposite directions to each other.

The holder module 248 includes a multi-shaft 248a installed on the multi-body 241 and freely rotated, and a support rail 248b provided to accommodate the link arm 247 on the multi-shaft 248a. do.

Accordingly, as shown in FIGS. 6 to 7, when the eccentric rotational power is transmitted through the driving-side eccentric shaft 245, the link arm 247 moves linearly on the support rail 248b and moves the multi-shaft 248a. It is provided to perform eccentric movement in the direction of 360° together with the lens L together with the z-axis spindle 230 connected to the driven-side eccentric shaft 246 while being pivotally moved to support it.

In FIG. 8, the eccentric driving unit 240 is provided such that the center point of the eccentric movement of the lens L is variable by the eccentric shaft variable module 250.

The eccentric shaft variable module 250 is installed under the multi-body 241 and the driving wheel 251 is installed, and the transport vehicle 252 is installed in the main body 10 to move the position of the transport vehicle 252 The moving rail 254 to guide the movement, and one end is screwed to the transport vehicle 252, the other end is installed on the main body 10, the adjustment screw 256 is provided rotatably by the handle (256a). Includes.

As the eccentric rotation power is transmitted while the z-axis spindle 230 is inclined by the position moving distance of the transport vehicle 252, the center point of the eccentric movement of the lens L is provided so that the center point of the eccentric movement of the lens L is variable, so that lenses of various standards are complexly polished Machinable versatility is provided.

9 to 10, the moving rail 254 is formed with an arcuate curvature protruding convexly downward, and the arcuate curvature center C1 is an intersection point C2 where the axes of the x and y axis shafts 212 are in contact with each other. It is provided to match.

Accordingly, the eccentric drive unit 240 is provided so that the inclination of the z-axis spindle 230 corresponding to the rotation angle of the adjustment screw 256 is maintained constant throughout the entire area that is curved along the moving rail 254 having an arcuate curvature. Accordingly, there is an advantage that the initial setting time is greatly shortened in response to the lens standard change.

In addition, it is installed in the y-axis yoke part 220, the upper part is opened, the z-axis spindle 230 and the lens L are accommodated therein, and a hopper 260 having an outlet 262 formed at the lower part is provided. do.

And the hopper 260 is provided to collect and discharge the cutting oil and grinding chips supplied to the lens (L) side, so that the external scattering of cutting oil and grinding chips is prevented, so that the surroundings are clean and the recovered cutting oil is circulated through a filter. do.

As described above, in the detailed description of the present invention, the most preferred embodiment of the present invention has been described, but various modifications are possible within the scope not departing from the technical scope of the present invention. Therefore, the scope of protection of the present invention is not limited to the above embodiments, but the scope of protection should be recognized from the techniques of the claims to be described later and from these techniques to equivalent technical means.

100: tool driving part 200: lens driving part
210: x-axis yoke portion 220: y-axis yoke portion
230: z-axis spindle 240: eccentric drive unit

Claims (9)

A tool driving part 100 provided with a polishing tool 130 installed in the main body 10 and moved up and down by the tool transfer unit 110 and the polishing pressure adjusted by the pressure control unit 120; And
Including; a lens driving unit 200 provided to rotate the lens (L) in a position opposite to the polishing tool 130 of the tool driving part 100 to rotate and eccentrically move in the 360° direction; and
The lens driving unit 200,
An x-axis yoke part 210 that is pivotally moved around an x-axis shaft 212 installed in the main body 10 and is provided with a pair of first support arms 214,
A pair of second support arms 222 are provided on the first support arm 214 to be connected to the y-axis shaft 224, and a y-axis yoke portion in which a z-axis hole 226 is formed in the lower center ( 220) and,
The z-axis spindle 230 is inserted into the z-axis hole 226 and is provided with a lens tool 232 on which the lens L is mounted, and is rotated by a driving source to rotate the lens L and,
It includes an eccentric driving unit 240 provided to eccentrically move the lens (L) in the 360 ° direction together with the z-axis spindle 230,
The eccentric drive unit 240 is installed on the multi-body 241 and rotated by a driving source, a vertical axis 242, a horizontal guide rail 243 connected to the vertical axis 242 and rotated, and a horizontal guide rail A transfer table 244 mounted on 243 and positioned by an adjustment tool 244a, a driving-side eccentric shaft 245 installed on the transfer table 244, and the z-axis spindle 230 and coaxial Includes a driven side eccentric shaft 246 installed under the y-axis yoke part 220 so as to match the image, and a link arm 247 connecting the driving side eccentric shaft 245 and the driven side eccentric shaft 246 And
The link arm 247 is oscillated to the support point of the holder module 248 so that the driving side eccentric shaft 245 and the driven side eccentric shaft 246 rotate eccentrically in opposite directions to each other,
The holder module 248 includes a multi-shaft 248a installed on the multi-body 241 and rotated freely, and a support rail 248b provided to accommodate the link arm 247 on the multi-shaft 248a. and,
The link arm 247 has a linear motion and a multi-shaft 248a on the support rail 248b, and the z-axis spindle 230 connected to the driven-side eccentric shaft 246 is connected to the driven side eccentric shaft 246 together with the lens L. An ultra-precise centripetal grinding system using a complex oscillating motion of a spindle, characterized in that it is provided to move eccentrically in a 360° direction.
delete delete delete The method of claim 1,
The eccentric driving unit 240 is provided so that the center point of the eccentric movement of the lens L is variable by the eccentric axis variable module 250,
The eccentric shaft variable module 250 is installed under the multi-body 241 and the driving wheel 251 is installed, and the transport vehicle 252 is installed in the main body 10 to move the position of the transport vehicle 252 The moving rail 254 to guide the movement, and one end is screwed to the transport vehicle 252, the other end is installed on the main body 10, the adjustment screw 256 is provided rotatably by the handle (256a). Including, the eccentric rotation power is transmitted in a state in which the z-axis spindle 230 is inclined by the position moving distance of the transport vehicle 252, and the center point of the eccentric movement of the lens L is variable. Ultra-precise centripetal grinding system using complex swing motion.
The method of claim 5,
The moving rail 254 is formed with an arcuate curvature protruding convexly downward, and the arcuate curvature center C1 is provided so as to coincide with an intersection point C2 where axes of the x and y axis shafts 212 are in contact with each other, and the eccentricity The driving unit 240 is characterized in that it is provided so that the inclination of the z-axis spindle 230 corresponding to the rotation angle of the adjustment screw 256 in the entire curve moving along the moving rail 254 having an arcuate curvature is maintained constant throughout the entire region. Ultra-precise centripetal grinding system using the complex oscillating motion of the rotating spindle.
The method of claim 1,
It is installed in the y-axis yoke part 220, the upper part is opened, the z-axis spindle 230 and the lens L are accommodated therein, and a hopper 260 having an outlet 262 formed at the lower part thereof is provided, The hopper 260 is an ultra-precision centripetal grinding system using a complex oscillation motion of a spindle, characterized in that it is provided to collect and discharge cutting oil and grinding chips supplied to the lens (L) side.
The method of claim 1,
The tool transfer unit 110 is moved vertically on a vertical guide rail 112 installed on the upper body 10 in a longitudinal direction, and a vertical guide rail 112, and a pressure control unit 120 at one end thereof Ultra precision using a complex oscillation motion of the spindle, characterized in that it comprises a rod arm 114 in which a mounting hole 114a is formed to be installed, and a driving cylinder 116 that controls the vertical movement of the rod arm 114 Centripetal polishing system.
The method of claim 8,
The pressure control unit 120 is inserted and fixed into the mounting hole 114a of the load arm 114, the outer sleeve 121 having a first through hole 121a formed therein, and the outer sleeve 121 The inner sleeve 122 is inserted into the first through hole 121a and fixed in position by the fastener 122a, the fixing bracket 122b is installed on the top, and the second through hole 122c is formed therein. , The pressure shaft 123 is inserted into the second through hole 122c of the inner sleeve 122, and the lifting bracket 123a is installed on the upper side, and the polishing tool 130 is installed to be rotated at the bottom of the pressure shaft 123. ) Is installed to pressurize the pressure pin 124, which is detachably mounted, and the pressure shaft 123 from the top, and the elastic body 125 whose compressive force is controlled by the adjusting screw 125a, and the fixing bracket 122b. The microhead 126 is installed so that the measurement surface 126a faces upward, and is installed on the lifting bracket 123a, so that the sensing rod 127a is in contact with the measurement surface 126a of the microhead 126. Including an indicator 127 to be arranged,
The rod arm 114 is moved downward to set the indicator 127 to zero using the microhead 126 while the polishing tool 130 is in contact with the upper surface of the lens L or the upper surface of the lens tool 232, Thereafter, during polishing of the lens L, an ultra-precision centripetal polishing system using a complex oscillation motion of a spindle, characterized in that it is provided to detect the polishing dimension by detecting the measured value of the indicator 127 based on the zero point.

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